Guided mode measurement on bone phantoms with realistic geometry

Using a dedicated axial transmission device and SVD-based signal processing, experimental wavenumbers were measured on bone mimicking phantoms of different geometries (plate, tube, radius shape). An estimation method based on the use of the dispersion function of an anisotropic plate model was applied to estimate elastic properties of the phantoms. This work has shown that measured data are sufficient to allow an estimation for all three considered geometries. Considering four different thicknesses for the plate geometry, a variability ranging from 5 to 15% was found for the estimated stiffnesses with a reproducibility less than 1%. For all phantoms, estimated stiffnesses are overall in good agreement with values obtained from reference measurements (transverse transmission).